630 



APPENDIX. 



[No. IV 



TABLE IV.— The mean Diurnal Variation of the Compass for four Months, were observed at Cumberland 



House by Lieutenant Hood, R.N-, lat. 53° 56' 40" N., long. 102° 16' 41" W. 



Months. 



1820 



February 

 March 



April 

 May 



8 A.M. 



« 



17 15 7 E 



17 16 9 



9 A.M. 



o * // 



17 16 O E 



17 14 9 



• • 



1 P.M. 



O / // 



17 11 2 



17 9 5 



17 8 8 



17 7 8 



28' 24' 



W 



ariation East Variation East Variation E^st 



1821 



O / // 



At 10 A.M 



January 36 27 57 



9 A.M. 



February 36 31 45 



Noon 



36 22 09 



36 21 57 



March 



36 17 21 



April 



8 a.m. 



36 29 36 



7 A.M. 

 36 07 45 



7 A.M. 

 36 42 03 I 36 29 45 



P.M. 

 12 39 



17 27 



36 06 03 



21 09 



Variation East 



P.M. 



12 03 



Variation East 



15 51 



10 45 



36 02 51 



Oil! 



6 and 5 p.m. 



18 57 

 5 and 4 p.m. 



13 03 

 4 P.M. 



36 06 



5 P.M. 

 36 00 15 



Variation Eastl Variation Eas 



O I II 



9 P.M. 

 36 16 09 



36 21 09 



14 57 



13 51 



Midnight 



36 09 09 



11 57 



36 06 37 



35 55 



36 12 09 



12 S3 



35 40 03 



36 11 33 



Mean Variation observed with the Needle attached to the Transit Instrument, placed at a greater distance 



from the Buildings at Fort Enterprise. 



' 



Between May 1 2 and 

 June 13, 1821 



8 and 9 a.m. 



Noon 



37 25 5E I 37 24 1 



4 and 5 P.M. 



o / // 



37 26 1 



9 and 10 p.m. 



37 22 8 



Midnight 



O / H 



37 23 OE 



TABLE VI, 



1822 



January . . 

 February 

 March . . 

 April . • . 



Monthly Abstract of Diurnal Variation, observed at Moose-Deer Island, Slave Lake, 



lat. 61° 11' 8" N., long. 113° 51' 37' W. 



Variation East 



- « L 



o / '/ 



from 7 a.m. 



to 9 or 10 A.M. 



25 42 52 





n 



Noon 



3 P.M. 



#/ 



Variation Eas 



5 P.M. 



25 42 23 25 41 



9 P.M. 

 25 40 42 



25 40 10 25 88 56 25 38 09 25 39 27 25 39 07 



25 40 52 

 25 42 16 



25 39 06 25 37 50 

 25 40 23 I 25 38 21 



25 37 16 

 25 38 10 



ean of the three complete ) 



Months, Feb. March, and y 



April ) 



25 41 06 



25 39 28 25 38 07 25 38 



25 37 47 

 25 3S 49 



Midnight 



25 39 55 

 25 37 26 

 25 35 02 

 25 38 15 



25 38 34 25 37 14 



» * 



